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GeForce GTX 860M vs Radeon HD 3850 X2

Intro

The GeForce GTX 860M has core clock speeds of 797 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 RAM. It features 1152 SPUs as well as 96 Texture Address Units and 16 ROPs.

Compare all that to the Radeon HD 3850 X2, which comes with a clock speed of 668 MHz and a GDDR3 memory frequency of 828 MHz. It also uses a 256-bit bus, and makes use of a 55 nm design. It features 320(64x5) SPUs, 16 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 3850 X2 should in theory be quite a bit better than the GeForce GTX 860M overall. (explain)

Radeon HD 3850 X2 105984 MB/sec
GeForce GTX 860M 64000 MB/sec
Difference: 41984 (66%)

Texel Rate

The GeForce GTX 860M is a lot (about 258%) faster with regards to anisotropic filtering than the Radeon HD 3850 X2. (explain)

GeForce GTX 860M 76512 Mtexels/sec
Radeon HD 3850 X2 21376 Mtexels/sec
Difference: 55136 (258%)

Pixel Rate

The Radeon HD 3850 X2 will be much (about 68%) better at AA than the GeForce GTX 860M, and also able to handle higher screen resolutions more effectively. (explain)

Radeon HD 3850 X2 21376 Mpixels/sec
GeForce GTX 860M 12752 Mpixels/sec
Difference: 8624 (68%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTX 860M

Amazon.com

Check prices at:

Radeon HD 3850 X2

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GTX 860M Radeon HD 3850 X2
Manufacturer nVidia AMD
Year March 12 2014 Apr 4, 2008
Code Name GM107 RV670 PRO
Memory 4096 MB 512 MB (x2)
Core Speed 797 MHz 668 MHz (x2)
Memory Speed 4000 MHz 1656 MHz (x2)
Power (Max TDP) 45 watts (Unknown) watts
Bandwidth 64000 MB/sec 105984 MB/sec
Texel Rate 76512 Mtexels/sec 21376 Mtexels/sec
Pixel Rate 12752 Mpixels/sec 21376 Mpixels/sec
Unified Shaders 1152 320(64x5) (x2)
Texture Mapping Units 96 16 (x2)
Render Output Units 16 16 (x2)
Bus Type GDDR5 GDDR3
Bus Width 128-bit 256-bit (x2)
Fab Process 28 nm 55 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 2.0 x16/(internal PCIe 1.1 x16)
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 860M

Amazon.com

Check prices at:

Radeon HD 3850 X2

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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